Official protocol by Équipe Prépa Physique · Intermittent Endurance
Intermittent Jag Test (IJT)
Measure the Maximum Intermittent Speed (VMI) reflecting the demands of intermittent sports
Primary measureVMI (km/h)
CategoryIntermittent Endurance
FormatIJT
Pacing audioManual / Camera
Standardized testing protocol
Start at 8.5 km/h running 30m efforts. After each effort, jog 15m in 8 seconds (decreasing by 0.2s per stage). Each stage consists of 4 repetitions. Speed increases by 0.5 km/h after each stage.
Required field equipment
Flat surface with cones at 0m, 15m, 30m, 45m (multiples of 15m), Time4Test audio soundtrack
Calculation formula & scoring
Time4Test automates this equation directly during the session:
VMI = last fully completed speed stage (km/h).
Scientific reference
Équipe Prépa Physique — Intermittent Jag Test (IJT). Official protocol for VMI assessment.
Execute in Time4Test
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